Has the owner of these animals the grazing rights of this lane way? If so I am thinking you will just have to avoid as its is you that could be considered frightening the animals.
If its a private lane way the owner of the property can follow for trespass so report to owner of lanway.
How do the animals not venture onto public roads. This doesn't really add up, surely just report to the guards that you nearly crashed into an animal on the road.